/*
 * Copyright (c) 1995, 2008, Oracle and/or its affiliates. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 *   - Neither the name of Oracle or the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package fileencoder;

import java.io.*;
import java.awt.*;
import java.awt.event.*;
import java.util.ArrayList;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.*;
import javax.swing.SwingUtilities;
import javax.swing.filechooser.*;

/*
 * FileChooserDemo.java uses these files:
 *   images/Open16.gif
 *   images/Save16.gif
 */
public class FileChooserDemo extends JPanel
        implements ActionListener {

    static private final String newline = "\n";
    JButton openButton, saveButton;
    JTextArea log;
    JFileChooser fc;
    String filename;
    String filename2 = "temp.temp";

    public FileChooserDemo() {
        super(new BorderLayout());

        //Create the log first, because the action listeners
        //need to refer to it.
        log = new JTextArea(5, 20);
        log.setMargin(new Insets(5, 5, 5, 5));
        log.setEditable(false);
        JScrollPane logScrollPane = new JScrollPane(log);

        //Create a file chooser
        fc = new JFileChooser();

        //Uncomment one of the following lines to try a different
        //file selection mode.  The first allows just directories
        //to be selected (and, at least in the Java look and feel,
        //shown).  The second allows both files and directories
        //to be selected.  If you leave these lines commented out,
        //then the default mode (FILES_ONLY) will be used.
        //
        //fc.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
        //fc.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);

        //Create the open button.  We use the image from the JLF
        //Graphics Repository (but we extracted it from the jar).
        openButton = new JButton("Open a File...");
        openButton.addActionListener(this);

        //Create the save button.  We use the image from the JLF
        //Graphics Repository (but we extracted it from the jar).
        saveButton = new JButton("Start");
        saveButton.addActionListener(this);

        //For layout purposes, put the buttons in a separate panel
        JPanel buttonPanel = new JPanel(); //use FlowLayout
        buttonPanel.add(openButton);
        buttonPanel.add(saveButton);

        //Add the buttons and the log to this panel.
        add(buttonPanel, BorderLayout.PAGE_START);
        add(logScrollPane, BorderLayout.CENTER);
    }

    public void actionPerformed(ActionEvent e) {

        //Handle open button action.
        if (e.getSource() == openButton) {
            int returnVal = fc.showOpenDialog(FileChooserDemo.this);

            if (returnVal == JFileChooser.APPROVE_OPTION) {
                File file = fc.getSelectedFile();
                //This is where a real application would open the file.
                log.append("Opening: " + file.getName() + "." + newline);
                filename = file.getAbsolutePath();
            } else {
                log.append("Open command cancelled by user." + newline);
            }
            log.setCaretPosition(log.getDocument().getLength());

            //Handle start button event.
        } else if (e.getSource() == saveButton) {
            byte[] result = readInFile();
            log.append("Done reading\n");
            write(result);
            log.append("Done writing\n");

        }
    }

    /**
     * Returns an ImageIcon, or null if the path was invalid.
     */
    protected static ImageIcon createImageIcon(String path) {
        java.net.URL imgURL = FileChooserDemo.class
                .getResource(path);
        if (imgURL
                != null) {
            return new ImageIcon(imgURL);
        } else {
            System.err.println("Couldn't find file: " + path);
            return null;
        }
    }

    /**
     * Create the GUI and show it. For thread safety, this method should be
     * invoked from the event dispatch thread.
     */
    private static void createAndShowGUI() {
        //Create and set up the window.
        JFrame frame = new JFrame("FileChooserDemo");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        //Add content to the window.
        frame.add(new FileChooserDemo());

        //Display the window.
        frame.pack();
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        //Schedule a job for the event dispatch thread:
        //creating and showing this application's GUI.
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                //Turn off metal's use of bold fonts
                UIManager.put("swing.boldMetal", Boolean.FALSE);
                createAndShowGUI();
            }
        });
    }

    private byte[] readInFile() {
        File file = new File(filename);
        byte[] result = null;

        try {
            InputStream input = null;
            try {
                input = new BufferedInputStream(new FileInputStream(file));
                int totalBytesRead = 0;
                result = new byte[(int) file.length()];
                //int byteRead = input.read();
                //log.append("Byte: "+byteRead);
//                //there is a 7 at the beginning so just pop it out and continue the read
//                if (byteRead == 55) {
//                    result = new byte[(int) file.length() - 1];
//                } 
//                //there is not a 7 so lets add it and increment
//                else {
//                    result = new byte[(int) file.length() + 1];
//                    result[0] = (byte)byteRead;
//                    totalBytesRead++;
//                }

                while (totalBytesRead < result.length) {

                    int bytesRemaining = result.length - totalBytesRead;
                    //input.read() returns -1, 0, or more :
                    int bytesRead = input.read(result, totalBytesRead, bytesRemaining);
                    if (bytesRead > 0) {
                        totalBytesRead = totalBytesRead + bytesRead;
                    }
                }
                /*
                 the above style is a bit tricky: it places bytes into the 'result' array; 
                 'result' is an output parameter;
                 the while loop usually has a single iteration only.
                 */
                //log("Num bytes read: " + totalBytesRead);
            } finally {
                //log("Closing input stream.");
                input.close();
            }
        } catch (FileNotFoundException ex) {
            //log("File not found.");
        } catch (IOException ex) {
            //log(ex);
        }
        return result;
    }

    void write(byte[] aInput) {
        if(aInput[0]==55){
            aInput = popOutIndexZero(aInput);
        }
        else{
            aInput = popIntoIndexZero(aInput);
        }
        try {
            OutputStream output = null;
            try {
                output = new BufferedOutputStream(new FileOutputStream(filename2));
                output.write(aInput);
            } finally {
                output.close();
            }
        } catch (FileNotFoundException ex) {
            //log("File not found.");
        } catch (IOException ex) {
            //log(ex);
        }
    }
    
    byte[] popOutIndexZero(byte[] in){
        byte[] out = new byte[in.length-1];
        for(int i=1; i<in.length; i++){
            out[i-1] = in[i];
        }
        return out;
    }
    byte[] popIntoIndexZero(byte[] in){
        byte[] out = new byte[in.length+1];
        out[0] = 55;
        for(int i=0; i<in.length; i++){
            out[i+1] = in[i];
        }
        return out;
    }
}
